A member of the 11th U.S. Cavalry sits and dismantles his rifle near a wooden crate that reads: "Old Dutch Cleanser The Cudahy Packing Co.," in Trinidad, Las Animas County, Colorado. The troops were called in at the request of Colorado Governor...

Members of the 11th U.S. Cavalry, pose their rifles at night in Trinidad, Las Animas County, Colorado. The troops were called in at the request of Colorado Governor Ammons, to restore order in the coal fields after the Ludlow Massacre at the time...

A member of the 5th U. S. Cavalry poses with his rifle inside a building in Trinidad (Las Animas County) Colorado. The troops were called in at the request of Colorado Governor Ammons, to restore order in the coal fields after the Ludlow Massacre...

Members of the 11th U.S. Cavalry unload supplies from a boxcar on the Colorado & Southern Railway near Trinidad, Las Animas County, Colorado. The troops were called in at the request of Colorado Governor Ammons, to restore order in the coal fields...

Members of the 11th U.S. Cavalry, pose inside a wooden building with their rifles and handguns, in Trinidad, Las Animas County, Colorado. The troops were called in at the request of Colorado Governor Ammons, to restore order in the coal fields...

A member of the 11th U.S. Cavalry, shakes hands with a man as the Cavalry arrives in Trinidad, Las Animas County, Colorado. The 11th Cavalry was called in at the request of Colorado Governor Ammons, to restore order in the coal fields after the...

Coal miners, a boy, a teenager, and a young girl stand and eat slices of bread near the remnants of the tent colony destroyed in the Ludlow Massacre during the U.M.W. strike against C.F. & I. in Ludlow (Las Animas County), Colorado. Wood, pieces of...

Members of the Colorado National Guard, called in to suppress the UMW strike against CF&I, pose near the water tank and the Colorado and Southern tracks on Water Tower Hill near Ludlow, Las Animas County, Colorado.

Boys march in support of UMW coal miners on strike against CF&I in Trinidad, Las Animas County, Colorado, carrying signs: "We Represent the CF&I Prosperity Slaves," "Let The Public take Over The Mines," "Colorado Civilization Turn Us Out in the...

A man inspects an underground shelter at the UMW camp for coal miners on strike against CF&I in Forbes, Las Animas County, Colorado, in which women and children died during a fire set by the Colorado National Guard.

A girl wears a striped dress, high-button shoes, and holds a doll while she poses by a window with lace curtains. She is the child of a UMWA coal miner on strike against CF&I, in Ludlow, Las Animas County, Colorado.

UMWA coal miners on strike against CF&I pose in a tent near the Mt. San Raphael Hospital in Trinidad (Las Animas County), Colorado. The men wear aprons and stand by an ornate cast iron stove. One holds a knife and sharpening rod; the other checks a...

Portrait of men, women, and children at the UMW camp for coal miners on strike against CF&I in Ludlow, Las Animas County, Colorado; also shows a canvas tent with lettering; "Made for the Neeley-Caldwell Hardware Co., Walsenburg, Colo."

An unidentified man and woman pose near their automobile, on the edge of a ravine, near a building destroyed by miners at the time of the U.M.W.A. strike against C.F. & I. in Las Animas County, Colorado. Shows a building, piles of logs and smoke...

Men stand near a building destroyed by miners at the time of the U.M.W.A. strike against C.F. & I. in Las Animas County, Colorado. Shows a building with a smokestack destroyed by an explosion, piles of logs and smoke from burning debris. Men pose...

Members of the Colorado National Guard, sent to suppress the UMWA strike against CF&I, pose next to a mule, with pistols drawn, in a camp near Ludlow, Las Animas County, Colorado. A howitzer canon is nearby.

Members of the Colorado National Guard, sent to quell the demonstrations in support of the UMW Ludlow strike against CF&I, march down Main Street, near the McCormick building, Trinidad, Las Animas County, Colorado. Spectators stand nearby....

Members of the Colorado National Guard, called in to suppress the UMWA strike against CF&I, stand and crouch near a tripod-mounted automatic rifle, on Water Tank Hill near Ludlow, Las Animas County, Colorado.